Slow cooker London broil is a simple and delicious way to transform a budget-friendly cut of beef into a tender, flavorful dish. By cooking it low and slow, the meat becomes juicy and packed with the rich flavors of garlic, onion, soy sauce, and beef broth.
It’s an easy, hands-off recipe that’s perfect for family dinners or meal prep. With just a few minutes of prep, the slow cooker does all the work, leaving you with a hearty and satisfying meal. Serve it with mashed potatoes, rice, or vegetables for a complete dinner everyone will love.
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Why This Recipe Works
This recipe works because slow cooking tenderizes the London broil, a lean cut of meat that can be tough if cooked too quickly. Searing the meat before slow cooking locks in the juices and adds a layer of caramelized flavor. The combination of soy sauce, beef broth, and onion creates a savory sauce that infuses the meat with delicious flavor while keeping it moist.
Another reason this recipe shines is its versatility and ease. It’s a one-pot meal that requires minimal effort but delivers restaurant-quality results. You can customize it with added vegetables or adjust the seasoning to your taste. Whether you’re serving a family dinner or entertaining guests, this recipe is a foolproof way to create a comforting and satisfying meal.
Ingredients
London Broil (Top Round Steak) – The main protein, tender and flavorful when slow-cooked. Substitute with flank steak or chuck roast if needed.
Beef Broth – Provides a rich, savory base for the dish. Substitute with vegetable broth or water with a bouillon cube.
Onion – Add sweetness and depth of flavor. Substitute with shallots or leeks.
Garlic – Enhances the savory taste of the dish. Substitute with garlic powder if fresh isn’t available.
Soy Sauce – Adds umami and enhances the sauce. Use tamari for a gluten-free option.
Tips
- Sear the meat before slow cooking to enhance flavor.
- Let the meat rest for 10 minutes before slicing to keep it juicy.
- Add vegetables like carrots or potatoes to make it a one-pot meal.
- Use a meat thermometer to check doneness (target 145°F/63°C for medium).
- Thicken the sauce with cornstarch at the end for a richer consistency.
How to Serve
Slow cooker London broil is a tender, flavorful dish that’s perfect for family dinners or special occasions. The rich sauce pairs beautifully with a variety of sides.
- Serve over mashed potatoes or rice to soak up the savory sauce.
- Pair with green beans or a fresh green salad for a healthy meal.
- Slice thinly and use in sandwiches or wraps for a tasty lunch option.
FAQs
What cut of meat should I use for London broil?
London broil usually uses top round or flank steak. These cuts are lean and become much more tender when cooked slowly with enough liquid and time.
Why is my London broil tough?
It may not have cooked long enough. This cut needs low, slow cooking to break down properly. Slicing against the grain also makes a big difference and helps the meat feel more tender.
Can I make it in the Instant Pot?
Yes, the Instant Pot works well for a faster version. Pressure cook with broth and seasonings for about 35–40 minutes with natural release. For full instructions and exact ingredients, check out my Instant Pot London Broil recipe.
Can I add vegetables to the slow cooker?
Yes, potatoes, carrots, and (more) onions work great. Add them around the meat so they cook in the juices and absorb more flavor while everything cooks together.
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Slow Cooker London Broil
Ingredients
- 2-3 lb London broil top round steak
- 1 cup beef broth
- 1 onion sliced
- 3 cloves garlic minced
- ¼ cup soy sauce
- 2 tablespoons olive oil for searing
- 1 teaspoon dried thyme
- ½ teaspoon black pepper
- 1 tablespoon cornstarch optional, for thickening
Instructions
- Heat olive oil in a skillet over medium-high heat. Sear the London broil on both sides until browned, about 3 minutes per side. Transfer to the slow cooker.
- Add the sliced onion and garlic to the slow cooker, spreading them over the meat.
- In a bowl, mix beef broth, soy sauce, thyme, and black pepper. Pour the mixture over the meat.
- Cover and cook on low for 7–8 hours or on high for 4–5 hours, until the meat is tender.
- Remove the meat and let it rest for 10 minutes before slicing.
- Optional: To thicken the sauce, mix 1 tablespoon of cornstarch with 2 tablespoons of water. Stir into the slow cooker and cook on high for 5–10 minutes until thickened.
- Serve the sliced meat with the sauce and your favorite sides.
Nutrition
Notes
- Sear the meat before slow cooking to enhance flavor.
- Let the meat rest for 10 minutes before slicing to keep it juicy.
- Add vegetables like carrots or potatoes to make it a one-pot meal.
- Use a meat thermometer to check doneness (target 145°F/63°C for medium).
- Thicken the sauce with cornstarch at the end for a richer consistency.
Super easy and tender London broil recipe that is absolutely melt in your mouth delicious.